Automatic ventilator



(No Model.) M. D. FUREY & E. THOMAS.

AUTOMATIC VENTILATOR.

No. 432.395. Patented July 15,1890.

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n: mama PETERS co, Pncro-Lmm, wAsnmc UNITED STATES PATENT OFFICE.

MARTIN D. FUREY AND EVAN THOMAS, OF MILXVAUKEE, WISCONSIN.

AUTOMATIC VENTI LATO R.

SPECIFICATION forming part of Letters Patent No. 432,395, dated July 15, 1890. Application filed March 1, 1890. Serial No. 342,235. (No model.)

' To all whom it) may concern.-

Be it known that we, MARTIN D. FUREY and EVAN THOMAS, of Milwaukee, in the county of Milwaukee and State of \Visconsin, have invented certain Improvements in Automatic Ventilators, of which the following is a specification. 7

Our invention relates to a ventilator intended more particularly for use on railwaycars for introducing air to the car when it is in motion, the object being to close the airinlet whenever the car is at rest,but open the same automatically when the car is moved in either direction.

To this end it consists, essentially, of a double-ended cowl or head divided by a vertical partition and combined with a gravitating valve which closes the inlet when relieved from pressure, but opens to one side or the other under the influence of the air entering .the cowl from either end. 1

In the accompanying drawings, Figure 1 is a sectional elevation illustrating our device as applied in connection with heating and ventilating apparatus of a railway-car. Fig. 2 is a vertical cross-section of a ventilator on a larger scale. Fig. 3 is a section of the same on the line a; w of Fig. 2. Fig. I is aperspeetive view of the' valve detached.

Referring to the drawings, A represents a vertical air-pipe joined at its upper end to the under side of and opening into a cowl or hood B, which is open at both ends, and which may be of any form adapted to permit air entering at either end to descend the pipe.

0 is a vertical partition or diaphragm fixed in the cowl and closing communication between its ends. This diaphragm is extended downward slightly into the mouth of the pipe A, so that the air-currents entering at either end of the cowl will encounter the plate and 'be directed downward.

D represents the valve of T form in vertical section. It is centrally pivoted at its top on a horizontal axis d at the lower end of the vertical plate 0. Its form is such that when in a normal position itsupper horizontal portion will completely close the air-pipe A and prevent the descent or' ascent of air therethrough. Vhen, however, itis tipped to either side, it will close communication between the pipeand cowl on one side of the diaphragm O and open communication on the other.

The operation is as follows The valve .stands normally in the position shown in full lines in Fig. 2. Then, however, a current of air enters either end of the cowl, it encounters the diaphragm O, and being deflected downward it acts to depress the valve on that side, the valve assuming the position shown in full lines in Fig. 1, allowing the air to descend freely through the pipe, while at the same time the passage through the pipe upward on the opposite side of the diaphragm is closed. It is immaterial from which end of the cowl the air enters. The "alve swinging to and fro will open communication with either end of the cowl, while closing it with the other.

Obviously the details of the parts may be varied both as to form and arrangement, provided only the mode of operation substanstantially such as herein described is retained.

\Ve believe ourselves to be the first to provide a valve which stands normally in a closed position, but which will yield to the pressure of the air and open communication through one end only of a double-ended cowl.

Having thus described our invention, what we claim is 1. In combination with the double-ended cowl, the air-pipe and the diaphragm dividing the cowl, and the gravitating T-shaped valve.

2. In combination with the air-pipe and a vertical division-plate in its upper end, a gravitating valve of T form in vertical section mounted to turn on a central horizontal axis, substantially as shown, whereby communication with the pipe may be established on either side of the diaphragm at the same time that it is closed on the other.

In testimony whereof we hereunto set our hands, this 31st day of January, 1890, in the presence of two attesting witnesses.

' MARTIN D. FUREY.

A EVAN THOMAS.

Witnesses: ALBERT KLINGLER, A. J. GAMM. 

